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  <script>
    var obj = {
      uname: '张三疯',
      age: 18,
      sex: '男',
      sayHi: function() {
        console.log("hi~");
      }
    }
    //1.对象.属性
    console.log(obj.uname);
    //2.对象['属性 ']
    console.log(obj['age']);
    obj.sayHi();
  </script>
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